Raybestos 8539R Disc Brake Rotor - Front or Rear

Raybestos R-Line 8539R Disc Brake Rotor Overview

The Raybestos R-Line 8539R is a conventional vented disc brake rotor built for applications that require a 15.000-inch outside diameter, 10 mounting bolt holes, and a 10-lug pattern. With a nominal thickness of 1.440 inches and a discard thickness of 1.320 inches, this rotor is specified for direct replacement use where OE-style dimensions matter. It is a practical choice for heavy-duty brake service on compatible Ford F-350 Super Duty and Ford F-450 Super Duty applications.

The Raybestos R-Line focuses on replacement parts that match key factory dimensions and fitment requirements. Part number 8539R is part of that line, giving buyers a straightforward option when searching for a Raybestos 8539R rotor for Ford Super Duty brake repair.

Key Specifications

• Brand: Raybestos R-Line
• Part number: 8539R
• Part type: Disc brake rotor
• Rotor type: Vented, conventional
• Outside diameter: 15.000 in. / 381.000 mm
• Nominal thickness: 1.440 in. / 36.600 mm
• Discard thickness: 1.320 in. / 33.550 mm
• Overall height: 4.440 in. / 112.800 mm
• Center hole diameter: 6.003 in. / 152.500 mm
• Bolt hole quantity: 10
• Bolt hole circle diameter: 7.250 in. / 184.150 mm
• Bolt hole diameter: 0.595 in. / 15.100 mm
• Stud/lug hole quantity: 10

Detailed Product Description

This rotor is built around the dimensions commonly used on Ford Super Duty rear brake applications, including Ford F-350 Super Duty and Ford F-450 Super Duty configurations that call for a 10-lug, vented, conventional rotor. The 15-inch outside diameter, 10-hole bolt pattern, and 6.003-inch center hole help ensure the rotor matches the hub and wheel-end geometry required by the vehicle platform. If you are replacing worn brake rotors on a Ford F-350 Super Duty or Ford F-450 Super Duty, the Raybestos 8539R provides the dimensional match needed for a proper service replacement.

This part cross-references Monroe Shocks & Struts 5617 for the same application.

What This Rotor Helps Address

• Brake pulsation caused by rotor wear or thickness variation
• Reduced braking performance from a worn or heat-affected rotor
• Noise related to rotor surface condition
• Service replacement needs on 10-lug Ford Super Duty brake systems
• Rotor replacement when discard thickness has been reached

Installation Notes and Fitment Tips

Compatible With Ford F-350 Super Duty and Ford F-450 Super Duty brake applications that use this 15-inch, 10-lug vented rotor specification. Verify outside diameter, center hole diameter, bolt circle diameter, and thickness against the original rotor before installation. Clean the hub mounting surface thoroughly and inspect related brake components, including pads and caliper hardware, before returning the vehicle to service. For search relevance, buyers often look for a Raybestos 8539R rotor for Ford F-350 Super Duty brake replacement or a Ford F-450 Super Duty rear brake rotor by part number.

Quality Assurance

Raybestos R-Line parts are cataloged as direct replacement brake components with application-specific dimensions and interchange references for service matching. The 8539R is listed with multiple cross-reference numbers, which helps confirm part identification during brake system maintenance and parts lookup.